Online Tool Store
Waist to Hip Ratio Calculator
Calculate your waist-to-hip ratio and WHO risk category from waist and hip measurements. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
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Waist-to-hip ratio is a screening indicator, not a diagnosis — WHO risk bands vary slightly by sex.
How it works
- Measure your waist at its narrowest point and your hips at their widest point.
- Enter both measurements in the same unit and select your sex for the correct risk bands.
The formula
Waist-to-hip ratio = waist circumference ÷ hip circumference
Women: <0.80 low risk, 0.80–0.85 moderate, >0.85 high (WHO)
Men: <0.90 low risk, 0.90–1.00 moderate, >1.00 high (WHO)
FAQ
What is waist-to-hip ratio?
Waist circumference divided by hip circumference — a simple screening indicator of how body fat is distributed. A higher ratio (more fat around the waist relative to the hips) is associated with higher cardiovascular risk than the same fat carried on the hips.
Do I need to convert units?
No — since it's a ratio, centimeters or inches give the same result as long as you measure waist and hip in the same unit. The unit selector is for your own reference only.
Where exactly do I measure?
Waist: around the narrowest point between your ribs and hip bones, usually just above the belly button. Hip: around the widest point of your buttocks. Measure standing, with the tape snug but not compressing the skin.
Is this a diagnosis?
No — it's a screening indicator using WHO risk bands, not a medical diagnosis. Talk to a healthcare provider for a full assessment.
How we compare
| Feature | Online Tool Store | Manual calculation | Fitness tracker apps |
|---|---|---|---|
| Instant WHO risk category | ✓ | Look up the bands yourself | ✓ |
| No account or app install | ✓ | ✓ | Requires sign-up |
For a quick check without creating a fitness-app profile, this gives the same WHO-standard result in seconds.